Margaret Chi, MD
NPI 1285028423 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Chi, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1285028423).
Provider details
- NPI number
- 1285028423
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A143920 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 277 | 129 |
| Losartan Potassium | 218 | 85 |
| Amlodipine Besylate | 179 | 75 |
| Lisinopril | 127 | 56 |
| Levothyroxine Sodium | 120 | 49 |
| Metformin Hcl | 92 | 40 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-03-25
- Last updated
- 2021-11-30
Frequently asked questions
- What is Margaret Chi's NPI number?
- Margaret Chi's National Provider Identifier (NPI) is 1285028423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Chi's specialty?
- Margaret Chi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Chi located?
- Margaret Chi's practice location on file with NPPES is 4733 W Sunset Blvd Fl 3, Los Angeles, CA 90027-6021.
- What is Margaret Chi's phone number?
- The practice phone number listed in the NPPES registry for Margaret Chi is (626) 236-2796.
- Does Margaret Chi accept Medicare?
- Margaret Chi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Chi's NPI active?
- Yes — Margaret Chi's NPI (1285028423) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.